package com.jgp.sys.utils;

import lombok.extern.log4j.Log4j2;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * 项目   sys
 * 作者   loufei
 * 时间   2018/2/24
 */
@Log4j2
public class SpringContextUtil implements ApplicationContextAware {
    
    private static ApplicationContext applicationContext;
    
    //获取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
    
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringContextUtil.applicationContext == null) {
            SpringContextUtil.applicationContext = applicationContext;
        }
    }
    
    //通过name获取 Bean.
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }
    
    //通过class获取Bean.
    public static <T> T getBean(Class<T> clazz) {
        T bean = null;
        try {
            bean = getApplicationContext().getBean(clazz);
        }catch (Exception e){
            log.error("获取不到bean:"+clazz.getName()+"\n",e);
        }
        return bean;
    }
    
    //通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
    
    
}